Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
  • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
  • F04B1/0404—Details or component parts
  • F04B1/0408—Pistons
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
  • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
  • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
  • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
  • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
  • B60T8/4031—Pump units characterised by their construction or mounting
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
  • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
  • F04B1/0404—Details or component parts
  • F04B1/0448—Sealing means, e.g. for shafts or housings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
  • F04B53/14—Pistons, piston-rods or piston-rod connections
  • F04B53/143—Sealing provided on the piston

Definitions

• the invention relates to a hydraulic fluid pump, in particular a vehicle brake system, with a housing, an axially displaceable in the housing in a piston housing ge lagertem piston, a piston moving drive and the piston chamber for A drive towards sealing sealing element. Furthermore, the invention relates to affybremsanlagi; with such a hydraulic fluid pump and a sealing element of a Hydraulikfluidpump e which is provided for insertion into a piston chamber of a housing of the hydraulic fluid pump in which a piston is mounted axially displaceable, which is movable by means of a drive.
• pump housings are formed in which two pistons are usually mounted so as to be displaceable. Each of the pistons is assigned to a brake circuit.
• the pistons are axially displaced back and forth by means of a single eccentric drive and in this way hydraulic fluid is sucked into and out of a pressure chamber formed in front of the piston.
• the pressure chamber is surrounded by its own housing shell or cylinder, which is also sealed on the piston side ,
• a cylinder and a piston images a so-called pump element, which is inserted in the housing in a stepped bore and is often pressed from the outside.
• the piston protrudes into the housing further into one area in which the eccentric drive is located at the end. In this area, he he as
• Piston space is called, the supply of hydraulic fluid is formed in the cylinder inside.
• the annular gap basically existing between the piston and the housing must be sealed by means of a sealing element in the form of a sealing ring.
• the sealing ring thus seals between the so-called low-pressure side of the piston and an eccentric chamber belonging to the eccentric drive.
• O-rings or Q-rings are usually produced from EPDM (ethylene-propylene-diene rubber) and generally have a comparatively good sealing behavior.
• EPDM ethylene-propylene-diene rubber
• a hydraulic fluid pump in particular a vehicle brake, is arranged with a housing, a piston axially displaceably mounted in the housing in a piston chamber, a drive moving the piston and a sealing element sealing the piston chamber towards the drive, in which the sealing element is designed as a membrane , which passes through the piston chamber transversely to the direction of movement of the piston.
• Remote sr is the object with a vehicle brake system solved with such a hydraulic fluid pump.
• a sealing element of a Hydraulikfluidpumpt which is provided for insertion into a piston chamber of a housing of the hydraulic fluid pump in which a piston axiai is slidably mounted, which is bewegbai by means of a drive, and which is designed as a membrane, which in the state inserted in the housing, the piston chamber passes transversely to the direction of movement of the piston.
• a complete sealing of the hydraulic region of a hydraulic fluid pump by its drive region is created by means of a membrane. It is c azu according to the invention in the piston chamber in which the piston of the hydraulic ikfluidpumpi; is arranged axially displaceable, arranged a piston space transversely to the direction of movement of the fColbens permeating membrane or a diaphragm.
• the axial movement de; Piston which is preferably about 2 mm, according to the invention by an elasticity of the membrane allows.
• the membrane according to the invention can particularly advantageously have the shape of a bellows in sections.
• the membrane provided according to the invention is particularly preferably fixed to the housing in a fixed manner.
• the membrane is particularly advantageously used on the housing in a rage, creating a positive connection between the housing and membrane, thereby ensuring a permanently unchanged position of the membrane over the entire operating time of the hydraulic fluid pump according to the invention.
• its piston is preferably designed in two parts, the membrane according to the invention then being arranged between the two parts of the piston.
• a tensile force-transmitting connection may be formed.
• the Verbindui ig only
• FIG. 1 shows a longitudinal section of an exemplary embodiment of a hydraulic fluid pump according to the prior art
• Fig. 2 is a longitudinal section of awhosbeispieis a hydraulic fluid pump according to the invention.
• a hydraulic fluid pump 10 is illustrated, which is arranged in a blockförmi that housing 12 of a not further illustrated hydraulic unit of a vehicle brake system.
• the hydraulic unit ensures vehicle brakes of an associated Fahrz ⁇ ugs in particular anti-lock and anti-slip function (ABS and ASR).
• a stepped bore 14 is formed, in which the actual pump element 16 of the hydraulic fluid pump 10 is arranged.
• the Pumpenelemei tt 16 has three housing or cylinder elements 18, 20 and 22, which surround a piston 24 and together with a part of the housing 12 for the piston 24 a cylinder t ilden.
• the piston 24 is opposed to a piston seal 26, sealed in the pressure space 28 and displaceable in the axial direction of the piston 24.
• a sealing ring 40 is vorgeseher.
• This sealing ring 40 surrounds the piston 24 and seals the inlet 30, the so-called low pressure side or the piston chamber 42 of the pump element 16, relative to the eccentric drive 38 and a eccentric chamber 44 there.
• the sealing ring 40 is therefore also referred to as a so-called low-pressure sealing element.
• the sealing ring 40 is stationary in the stepped bore 14 of the housing 12, and the piston 24 moves along the sealing ring 40 in its pumping movement relative to the pressure chamber 28. In this relative movement between the sealing ring 40 and KoIb; n 24 can lead to drag repackage of hydraulic fluid, whereby Hydraulikiluid in the
• Exzenterraum 44 reach and it can lead to damage in particular a (not d ⁇ drew) engine of the eccentric 38.
• Hydraulikftuidpumpe 10 according to the invention is illustrated, which is designed with respect to the components 12 to 38 substantially the same, as dit hydraulic fluid pump 10 of the prior art of FIG. 1st
• the dreams dream 42 passes transversely to the direction of movement of the piston 24.
• the piston 24 is designed Z ⁇ / eitilor, wherein a piston member 24a abuts the eccentric 38 and extends to the diaphragm 46 and the second piston member 24b extends from the diaphragm 46 into the pressure chamber 21.
• the diaphragm 46 is fixedly arranged on the housing 12 in such a way and elastic shape 5t is that an axial movement of the piston 24 or the piston parts 24a and 24b relative to the housing 12 is possible.
• the membrane 46 has for this purpose a radially outer edge region 48, which is fixedly held on the housing 12. Radially inwardly of the edge region 48, the membrane 46 is formed with an elastic inner region 50, which is also referred to as a diaphragm.
• the inner region 50 can, as shown, be linear in cross-section and / or have wave-shaped sections.
• a (order fangs-) groove 52 is formed.
• Such Membraun 46 leads to a hermetic separation of the low pressure side or the piston chamber 42 from the eccentric 44 on the invention according to the invention Iihydrauli iidpumpe IO of FIG. 2 and thus prevents any possible leakage of Hydraulikfluii I in the eccentric 44th

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Transportation (AREA)
• Details Of Reciprocating Pumps (AREA)
• Valves And Accessory Devices For Braking Systems (AREA)
• Regulating Braking Force (AREA)
• Reciprocating Pumps (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (2)

Family

ID=40719464

Family Applications (1)

Country Status (7)

Cited By (1)

Families Citing this family (11)

Citations (4)

Family Cites Families (13)

• 2008
  • 2008-01-08 DE DE102008003454A patent/DE102008003454A1/de not_active Withdrawn
  • 2008-11-25 JP JP2010541729A patent/JP2011511196A/ja active Pending
  • 2008-11-25 EP EP08870362A patent/EP2240690B1/de not_active Not-in-force
  • 2008-11-25 US US12/812,132 patent/US8800427B2/en not_active Expired - Fee Related
  • 2008-11-25 WO PCT/EP2008/066115 patent/WO2009086988A2/de active Application Filing
  • 2008-11-25 CN CN200880124334.2A patent/CN101910626B/zh not_active Expired - Fee Related
  • 2008-11-25 KR KR20107015084A patent/KR101490724B1/ko not_active IP Right Cessation

Patent Citations (4)

Also Published As

Similar Documents

Legal Events